Eucalyptus cameronii, commonly known as the diehard stringybark is a flowering plant that is endemic to eastern Australia. It is a small to medium-sized tree with rough, stringy bark from the trunk to the small branches, lance-shaped to curved adult leaves, flowers buds in groups of between nine and fifteen, white flowers and cup-shaped, hemispherical or more or less spherical fruit. It mainly grows on the eastern side of the Northern Tablelands in New South Wales.